Help File Dev C++

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Linux file command help and information with file examples, syntax, related commands, and how to use the file command from the command line. To compile and run simple console applications such as those used as examples in these tutorials it is enough with opening the file with Dev-C and hit F11. As an example, try: File - New - Source File. Oct 23, 2008 I'm using Bloodshed DevC but it cannot compile,and only displaying this message 'The system could not find the file specified'.And when I start it,it displays this CAUTION:There doesn't seem to be GNU Make file in PATH or in Dev-C Bin Path.Please make sure that you have GNU Make and adjust Bin setting or system PATH enviroment variable and that make setting in Compiler Option contains.

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Description

The C library function FILE *fopen(const char *filename, const char *mode) opens the filename pointed to, by filename using the given mode.

Declaration

Following is the declaration for fopen() function.

Parameters

  • filename − This is the C string containing the name of the file to be opened.

  • mode − This is the C string containing a file access mode. It includes −

Sr.No.Mode & Description
1

'r'

Opens a file for reading. The file must exist.

2

'w'

Creates an empty file for writing. If a file with the same name already exists, its content is erased and the file is considered as a new empty file.

3

'a'

Appends to a file. Writing operations, append data at the end of the file. The file is created if it does not exist.

4

'r+'

Opens a file to update both reading and writing. The file must exist.

5

'w+'

Creates an empty file for both reading and writing.

6

'a+'

Opens a file for reading and appending.

Return Value

This function returns a FILE pointer. Otherwise, NULL is returned and the global variable errno is set to indicate the error.

Example

Dev

The following example shows the usage of fopen() function.

Let us compile and run the above program that will create a file file.txt with the following content −

Now let us see the content of the above file using the following program −

Let us compile and run the above program to produce the following result −

Creating 2D graphics programs under DOS is easy if you’re using [turbo c]. There is library file called graphics.h that does the tiresome work for you. But unfortunately this library is borland specific you can’t use it on other compilers.

Even though some peoples somehow managed to port it outside the turbo. Some people hacked their own version of graphics.h. One such person is Micheal main, he ported some of borland graphics functions and library.

Micheal main modified BGI library for windows application to be used under MinGW. This BGI library is renamed as WinBGIm. Now you can use all the borland specific functions under Dev-C++.

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InstallationÂ

In order to run graphics programs under Dev-C++ you have to download WinBGIm files. Download the files listed below.

  • Graphics.h (download to C:Dev-Cppinclude)
  • libbgi.a(download to C:Dev-Cpplib)

Once you download the files. Now you have to place into the correct location in Dev-C++ installation folder. Try to locate include and lib folder under your dev-cpp installation. Move these files under the respective folder of include and lib. like e.g. D:Dev-cpp include & D:Dev-cpplib .

Configuration
At last step you’ve downloaded & installed the WinBGIm, now you have to configure it to use under Dev-C++. You’ve to set some project options in Dev-C++ in order to run WinBGIm references properly.
Follow the steps below to set proper project options for WinBGIm.

Dev C++ For Windows 10

1. Go to the “File” menu and select “New”, “Project”,Choose “Empty Project” and make sure “C++ project” is selected. Give your project suitable name and click on “Ok”.

OR

1. You can create individual C++” source file” instead of “project”. Go to the “File” menu and select “New Source File” OR Go to the “Project” menu and select “New File”.

2. Go to “Project” menu and choose “Project Options”.
3. Go to the “Parameters” tab.
4. In the “Linker” field, enter the following text:

  • -lbgi
  • -lgdi32
  • -lcomdlg32
  • -luuid
  • -loleaut32
  • -lole32

5.Click “Ok” to save settings.
Now you’ve done with the configuration for WinBGIm. Please make sure you’ve done this step properly otherwise compiler will flag error.

Testing & Debugging

Now let’s write a small program to test how WinBGIm works. Here is the source code for the program. Type it down,save it with .cpp extension and compile and run to see the results.

#include <graphics.h>

#include <iostream>

using namespace std;

int main()
{
initwindow(800,600);
circle(200,300,600);
while(!kbhit());
closegraph();
return 0;
}

This is the program for displaying circle with respective parameters on window of size 800×600.This window will close when you press any key.If you’ve made settings correctly then you can view the graphics,without any problem.

What’s included ?
All the borland graphics batteries included, plus some additional written by other contributors of WinBGIm. With WinBGIm you can use most of the borlands graphics function & RGB colors. You can also use detectgraph() and initgraph() or you can use new function called initwindow(). You can even use some of the old mouse function such as int mousex() & int mousey() along with getmouseclick() & clearmouseclick(). For keyboard functions,you don’t have to include conio.h some of the functions are supported without it like void delay(int millisec),int getch( ),int kbhit( ).

If you want to capture the screen where you’ve created your graphics. You can do it with help of these functions getimage(),imagesize(), printimage(), putimage(), readimagefile() ,writeimagefile().

Help & Support
If you’re into some trouble with installation & configuration,then please post your questions here. But please don’t post homework problems or your custom projects.Google groups is the right place to get answers in such cases. You can even get lot of support with WinBGIm and Dev-C++ at Google groups. If you want to read about the WinBGIm documentation & FAQ.

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If you’ve any question or suggestion then don’t hesitate to post it here.If you know any alternative than WinBGIm,please post about it here.